Bard QTEC QA241 Series User manual

Manual 2100-437E
Page 1 of 31
Bard Manufacturing Company, Inc.
Bryan, Ohio 43506
Since 1914 . . . Moving ahead, just as planned.
Manual: 2100-437E
Supersedes: 2100-437D
File: Vol II Tab 14
Date: 10-10-06
© Copyright 2004
Models:
QA241 QA301
QA361 QA421
QA481 QA601
QTEC SERIES
PACKAGED
AIR CONDITIONER
INSTALLATION
INSTRUCTIONS

Manual 2100-437E
Page 2 of 31
CONTENTS
Figures
Figure 1 Unit Dimensions .......................................... 8
Figure 2 Air Seal on Bottom of Unit ........................... 9
Figure 3 Removal of Unit From Skid ......................... 9
Figure 4 Unit on Appliance Cart for Moving ............. 10
Figure 5 Installation With Free Blow Plenum .......... 11
Figure 6 Ducted Application ..................................... 11
Figure 7 Supply Duct Connections .......................... 12
Figure 8 Filter Location ............................................ 12
Figure 9 Side Drain .................................................. 13
Figure 10 Optional Rear Drain ................................... 13
Figure 11 Rear Drain (Top View) ............................... 14
Figure 12 Unit Mounting ............................................ 14
Figure 13 Screws in Wheels of Unit .......................... 15
Figure 14 Component Location ................................. 16
Figure 15 Thermostat Plug Terminals ........................ 18
Figure 16 Thermostat Wiring Diagram "X" Option .... 19
Figure 17 Thermostat Wiring Diagram "A" Option .... 20
Figure 18 Thermostat Wiring Diagram "D" Option ... 21
Figure 19 Fresh Air Damper Removal ....................... 26
Figure 20 QERV Removal ......................................... 27
Figure 21 Fan Blade Setting ...................................... 30
Tables
Table 1 Factory Built-In Electric Heat Table .............. 5
Table 2 Electrical Specifications ................................ 6
Table 2A Electrical Specifications ................................ 7
Table 3 Operating Voltage Range ........................... 16
Table 4 Wall Thermostats ........................................ 18
Table 5 Troubleshooting .......................................... 29
Table 6 Fan Blade Dimensions ............................... 30
Table 7 Indoor Blower Performance ........................ 30
Table 8 Cooling Pressure ........................................ 31
Getting Other Information and Publications
For more information, contact these publishers: .......... 3
QTEC General Information
QTEC Model Nomenclature .......................................... 4
Shipping Damage ......................................................... 9
Unit Removal From Skid .............................................. 9
Handling Unit After Removal From Skid ..................... 10
General ....................................................................... 10
Minimum Installation Height ....................................... 10
Duct Work .................................................................. 12
Filters .......................................................................... 12
Fresh Air Intake .......................................................... 13
Condensate Drain ...................................................... 13
Separate Evaporator Drain Connection ..................... 13
Service Light ............................................................... 14
Installation Instructions
Mounting the Unit ....................................................... 15
Wiring — Main Power ................................................. 16
Wiring — Low Voltage Wiring ..................................... 16
Low Voltage Connections ........................................... 17
General ....................................................................... 17
Start Up
Description of Standard Equipment ............................... 22
Optional CFM (QA361, QA421, QA481
and QA601 Only) ........................................................... 22
Important Installer Note .................................................. 22
Phase Monitor ................................................................ 22
Three Phase Scroll Compressor Start Up
Information ....................................................... 22 & 23
Service Hints .................................................................. 23
Mist Eliminator Service .................................................. 24
Vent Options ......................................................... 24 & 25
Sequence of Operation .................................................. 28
Optional Climate Controls Sequence
of Operation .............................................................. 28
Pressure Service Ports .................................................. 28
Troubleshooting
Troubleshooting Table .................................................... 29
Fan Blade Setting Dimensions ...................................... 30
Refrigerant Charge ........................................................ 30
Pressure Chart ............................................................... 31

Manual 2100-437E
Page 3 of 31
GETTING OTHER INFORMATION AND PUBLICATIONS
These publications can help you install the air
conditioner or heat pump. You can usually find these at
your local library or purchase them directly from the
publisher. Be sure to consult current edition of each
standard.
National Electrical Code ..................... ANSI/NFPA 70
Standard for the Installation ............. ANSI/NFPA 90A
of Air Conditioning and Ventilating Systems
Standard for Warm Air ...................... ANSI/NFPA 90B
Heating and Air Conditioning Systems
Load Calculation for ....................... ACCA Manual J or
Winter and Summer Manual N
Air Conditioning
Low Pressure, Low Velocity ........ ACCA Manual D or
Duct System Design Manual Q
Winter and Summer Air Conditioning
FOR MORE INFORMATION, CONTACT
THESE PUBLISHERS:
ACCA Air Conditioning Contractors of America
1712 New Hampshire Avenue
Washington, DC 20009
Telephone: [phone]
Fax: [phone]
ANSI American National Standards Institute
11 West Street, 13th Floor
New York, NY 10036
Telephone: [phone]
Fax: [phone]
ASHRAE American Society of Heating, Refrigeration,
and Air Conditioning Engineers, Inc.
1791 Tullie Circle, N.E.
Atlanta, GA 30329-2305
Telephone: [phone]
Fax: [phone]
NFPA National Fire Protection Association
Batterymarch Park
P.O. Box 9101
Quincy, MA 02269-9901
Telephone: [phone]
Fax: [phone]

Manual 2100-437E
Page 4 of 31
QT EC Series General Information
QT EC MODEL NOMENCLATURE
QA 36 1 – A 10 X X X X X X
REVISION |
VOLTS & PHASE |
A - 230/208/60/1
B - 230/208/60/3
C - 460/60/3
COIL OPTIONS
X - Standard
1 - Coated Evap. Coil
2 - Coated Cond. Coil
3 - Coated Evap. &
Cond. Coil
CLIMATE CONTROL OPTIONS
X - None
A - Electronic/Non Prog/Man C/O
D - Electronic/Prog/Man/Auto
MODEL NUMBER |
QA - QTEC Model
CAPACITY |
24 - 2 Ton
30 - 2½ Ton
36 - 3 Ton
42 - 3½ Ton
48 - 4 Ton
60 - 5 Ton
KW
0Z - 0KW
05 - 5KW
06 - 6KW
09 - 9KW
10 - 10KW
12 - 12KW
15 - 15KW
VENTILATION OPTIONS
X - Barometric Fresh Air Damper (Standard)
B - Blank-off Plate
V - Commercial Ventilator - Motorized w/Exhaust
Spring Return
P - Commercial Ventilator - Motorized w/Exhaust
Power Return
R - Energy Recovery Ventilator w/Exhaust
E - Economizer
FILTER OPTIONS
X - 1 Inch Fiberglass
(Standard)
F - 2 Inch Fiberglass
P - 2 Inch Pleated
COLOR OPTIONS
V - Platinum w/Slate
Front (Vinyl)
4 - Gray paint
I NTERNAL CONTROLS
X - Standard
• High Pressure Switch
• Compressor Time Delay
J - Alarm Relay + LPC
G - LPC (Low Pressure Control)

Manual 2100-437E
Page 5 of 31
TABLE 1
FACTORY BUILT-IN ELECTRIC HEAT TABLE
sledoM A-142AQ A-103AQB-142AQB-103AQC-142AQC-103AQ
A-163AQ A-124AQ A-184AQ
B-163AQ B-124AQ B-184AQ
C-163AQ C-124AQ C-184AQA-106AQB-106AQC-106AQ
1-V0421-V8021-V0421-V8021-V0421-V8023-V0843-V0841-V0421-V8021-V0421-V8023-V0841-V0421-V8021-V0421-V8023-V084
WKHUTBHUTBHUTBHUTBHUTBHUTBHUTBHUTBHUTBHUTBHUTBHUTBHUTBHUTBHUTBHUTBHUTBHUTB
0.5083,61092,21 083,61092,21 0.6005,02063,51005,02063,51005,02005,02005,02063,51005,02
0.9007,03000,32007,03000,32007,03007,03007,03000,32007,03007,03000,32007,03
0.01076,23075,42 076,23075,42076,23075,42
0.21000,14007,03000,14 0.51 051,94068,63051,94068,63051,94051,94068,63051,94068,63051,94

Manual 2100-437E
Page 6 of 31
ELECTRICAL SPECIFICATIONS CONTINUED ON PAGE 7 TABLE 2A
1Maximum size of the time delay fuse or HACR type circuit breaker for protection of field wiring conductors.
2Based on 75°C copper wire. All wiring must conform to the National Electrical Code and all local codes.
3These “Minimum Circuit Ampacity” values are to be used for sizing the field power conductors. Refer to the National Electric
Code (latest revision), article 310 for power conductor sizing.
CAUTION: When more than one field power conductor circuit is run through one conduit, the conductors must be derated.
Pay special attention to Note 8 of Table 310 regarding Ampacity Adjustment Factors when more than three
conductors are in a raceway.
TABLE 2
ELECTRICAL SPECIFICATIONS
SLEDOM
DETAR &STLOV SESAHP
TIUCRICELGNIS TIUCRICLAUD
.ON DLEIF REWOP STIUCRIC
3
MUMINIM TIUCRIC YTICAPMA
1
MUMIXAM LANRETXE ROESUF TIUCRIC REKAERB
2
DLEIF REWOP ERIW EZIS
2
DNUORG ERIW EZIS
3
MUMINIM TIUCRIC YTICAPMA
1
MUMIXAM LANRETXE ROESUF TIUCRIC REKAERB
2
DLEIF REWOP EZISERIW
2
DNUORG EZISERIW
TKCATKCBTKCATKCBTKCATKCBTKCATKCB
Z0A-142AQ 50A- 01A- 1-802/032 1
1
1
020355 030306 0101
6
010101 ------ ------ ------ ------ ------ ------ ------ ------
Z0B-142AQ 60B- 90B- 3-802/032 1
1
1
514233 025253 2101
8
210101 ------ ------ ------ ------ ------ ------ ------ ------
Z0C-142AQ 60C- 90C- 3-064 1
1
1
8
2171
515102 414121 414121 ------ ------ ------ ------ ------ ------ ------ ------
Z0A-103AQ 50A- 01A- 1-802/032 1
1
1
522375 535306 8
8
6
010101 ------ ------ ------ ------ ------ ------ ------ ------
Z0B-103AQ 60B- 90B- 21B-
3-802/032
1
1
1
1
81524334 52525354 0101
8
6
01010101 -------- -------- -------- -------- -------- -------- -------- --------
Z0C-103AQ 60C- 90C- 21C-
3-064
1
1
1
1
01418132 51510252 41412101 41412101 -------- -------- -------- -------- -------- -------- -------- --------
Z0A-163AQ 50A- 01A- 51A-
3-802/032
1
1
12RO1
82338538 53530609 8
8
6
4
0101
8
8
------85 ------52 ------06 ------52 ------
6
------01 ------01 ------01
Z0B-163AQ 60B- 90B- 51B-
3-802/032
1
1
1
1
12625335 03035306 0101
8
6
01010101 -------- -------- -------- -------- -------- -------- -------- --------
Z0C-163AQ 60C- 90C- 51C-
3-064
1
1
1
1
11418172 51510203 41412101 41412101 -------- -------- -------- -------- -------- -------- -------- --------

Manual 2100-437E
Page 7 of 31
1Maximum size of the time delay fuse or HACR type circuit breaker for protection of field wiring conductors.
2Based on 75°C copper wire. All wiring must conform to the National Electrical Code and all local codes.
3These “Minimum Circuit Ampacity” values are to be used for sizing the field power conductors. Refer to the National Electric
Code (latest revision), article 310 for power conductor sizing.
CAUTION: When more than one field power conductor circuit is run through one conduit, the conductors must be derated. Pay
special attention to Note 8 of Table 310 regarding Ampacity Adjustment Factors when more than three conductors
are in a raceway.
TABLE 2A
ELECTRICAL SPECIFICATIONS
LEDOM
DETAR &STLOV ESAHP
TIUCRICELGNIS TIUCRICLAUD
.ON DLEIF REWOP STIUCRIC
3
MUMINIM TIUCRIC YTICAPMA
1
MUMIXAM LANRETXE ROESUF TIUCRIC REKAERB
2
DLEIF REWOP ERIW EZIS
2
DNUORG ERIW EZIS
3
MUMINIM TIUCRIC YTICAPMA
1
MUMIXAM LANRETXE ROESUF TIUCRIC REKAERB
2
DLEIF REWOP EZISERIW
2
DNUORG EZISERIW
TKCATKCBTKCATKCBTKCATKCBTKCATKCB
Z0A-124AQ 50A- 01A- 51A-
1-802/032
1
1
12RO1
33338538 05050609 8
8
6
4
0101
8
8
------85 ------52 ------06 ------52 ------
6
------01 ------01 ------01
Z0B-124AQ 60B- 90B- 51B-
3-802/032
1
1
1
1
52625335 53535306 8
8
8
6
01010101 -------- -------- -------- -------- -------- -------- -------- --------
Z0C-124AQ 60C- 90C- 51C-
3-064
1
1
1
1
31418172 51510203 41412101 41412101 -------- -------- -------- -------- -------- -------- -------- --------
Z0A-184AQ 50A- 01A- 51A-
1-802/032
1
1
12RO1
53538538 05050609 8
8
6
4
010101
8
------85 ------52 ------06 ------52 ------
8
------01 ------01 ------01
Z0B-184AQ 50B- 01B- 51B-
3-802/032
1
1
1
1
62625335 53530406 8
8
8
6
01010101 -------- -------- -------- -------- -------- -------- -------- --------
Z0C-184AQ 60C- 90C- 51C-
3-064
1
1
1
1
41418172 51510203 21212101 21212101 -------- -------- -------- -------- -------- -------- -------- --------
Z0A-106AQ 01A- 51A- 1-802/032 1
12ro1
649548 060609 8
6
4
0101
8
----95 ----52 ----06 ----52 ----
8
----01 ----01 ----01
Z0B-106AQ 90B- 51B- 3-802/032 1
1
1
236355
545406 8
8
6
010101 ------ ------ ------ ------ ------ ------ ------ ------
Z0C-106AQ 90C- 51C- 3-064 1
1
1
719182 020203 212101 212101
------ ------ ------ ------ ------ ------ ------ ------

Manual 2100-437E
Page 8 of 31
FIGURE 1
UNIT DIMENSIONS

Manual 2100-437E
Page 9 of 31
SHIPPING DAMAGE
Upon receipt of equipment, the carton should be
checked for external signs of shipping damage. The
skid must remain attached to the unit until the unit is
ready for installation. If damage is found, the receiving
party must contact the last carrier immediately,
preferably in writing, requesting inspection by the
carrier’s agent.
UNIT REMOVAL FROM SKID
FIGURE 3
REMOVAL OF UNIT FROM SKID
It is recommended that the unit not be removed from the
skid with a forklift since the air seal under the unit could
be damaged. See Figure 2.
The shipping brackets on each side of the unit must be
removed and discarded. See Figure 3-A. The return air
grille panel can be removed to provide a place to hold
the unit. The unit can be slid forward on the skit until
the front wheels hang over the edge of the skid. See
Figure 3-B. The unit can be tipped forward and slid
down the edge of the skid until the front wheels touch
the ground. See Figure 3-C. The wheels will not roll.
They are shipped from the factory locked so they will
not roll. The back of the skid will have to be held down
to keep it from tipping up. The skid can be slid out from
under the unit. The unit can then be set upright.
WARNING
This unit is heavy and requires more than one
person to handle and remove from the skid.
Check unit wheels to ensure that wheels are
locked before removing from skid. Extreme
caution must be taken to prevent injury to
personnel and damage to the unit.
FIGURE 2
AIR SEAL UNDER QT
EC UNIT
Air Seal
Hold Skid
Down
AShipping Brackets BFront Wheels Over Edge CFront Wheels On Floor

Manual 2100-437E
Page 10 of 31
HANDLING UNIT AFTER REMOVAL
FROM SKID
The unit will have to be turned sideways and removed
from the skid to fit through a 36" doorway. If the door
height allows, the unit can be slid sideways through the
door.
If the unit can not be slid through the door, then the unit
will have to be put on a cart and tipped down to roll
through the door. It is recommended that an appliance
cart by used with a strap to hold the unit on the cart.
The wheels of the unit must be locked. If the wheels
were allowed to roll, the unit could roll off the cart. The
unit should always be carted from the left side. This is
the side where the compressor is located. See Figure 4.
The blade of the appliance cart should be slid under the
wheels of the unit. The strap of the appliance cart
should be placed around the unit and strapped tightly.
Help will be required to tip the unit back onto the cart.
The unit can be leaned far enough back to be rolled
through the door. Be careful when setting the unit back
up to keep from damaging the unit.
GENERAL
The equipment covered in this manual is to be installed
by trained, experienced service and installation
technicians.
The unit is designed for use with or without duct work.
For use without duct work, Plenum Box QPB42 is
recommended.
These instructions explain the recommended method to
install the air cooled self-contained unit and the
electrical wiring connections to the unit.
These instructions and any instructions packaged with
any separate equipment required to make up the entire
air conditioning system should be carefully read before
beginning the installation. Note particularly “Start
Procedure” and any tags and/or labels attached to the
equipment.
While these instructions are intended as a general
recommended guide, they do not supersede any national
and/or local codes in any way. Authorities having
jurisdiction should be consulted before the installation is
made. See Page 3 for information on codes and
standards.
Size of unit for a proposed installation should be based
on heat loss calculation made according to methods of
Air Conditioning Contractors of America (ACCA). The
air duct should be installed in accordance with the
Standards of the National Fire Protection Systems of
Other Than Residence Type, NFPA No. 90A, and
Residence Type Warm Air Heating and Air
Conditioning Systems, NFPA No. 90B. Where local
regulations are at a variance with instructions, installer
should adhere to local codes.
MINIMUM INSTALLATION HEIGHT
The minimum installation height of the unit with a Free
Blow Plenum is 8 ft. 6 in. This provides enough
clearance for the plenum to be removed. See Figure 5.
The minimum installation height for ducted applications
is 8 ft. 4½ in. This provides enough clearance to install
the duct work. See Figure 6.
FIGURE 4
UNIT ON APPLIANCE CART
WARNING
Exercise extreme caution when pushing the
unit on the rollers. Handle and push from the
lower 1/3 of the unit. Insure that debris is not
on the floor where the unit is to be moved on
the rollers. Failure to do so could result in the
unit tipping over and causing bodily injury and/
or damage to the unit.
QTEC UNIT
(Right Side)
APPLIANCE
CART
COMPRESSOR
STRAP

Manual 2100-437E
Page 11 of 31
FIGURE 6
DUCTED APPLICATION
FIGURE 5
INSTALLATION WITH FREE BLOW PLENUM

Manual 2100-437E
Page 12 of 31
DUCT WORK
All duct work must be properly sized for the design
airflow requirement of the equipment. Air Conditioning
Contractors of America (ACCA) is an excellent guide to
proper sizing. All duct work or portions thereof not in
the conditioned space should be properly insulated in
order to both conserve energy and prevent condensation
or moisture damage. When duct runs through unheated
spaces, it should be insulated with a minimum of one
inch of insulation. Use insulation with a vapor barrier
on the outside of the insulation. Flexible joints should
be used to connect the duct work to the equipment in
order to keep the noise transmission to a minimum.
The QT EC series unit has provision to attach a supply air
duct to the top of the unit. Duct connection size is 12
inches x 20 inches. The duct work is field supplied and
must be attached in a manner to allow for ease of
removal when it becomes necessary to slide the unit out
from the wall for service. See Figure 7 for suggested
attachment method.
NOTE: Unit cabinet, supply air duct and free blow
plenum are approved for “0” clearance to
combustible material.
The QT EC series units are designed for use with free
return (non-ducted) and either free blow with the use of
QPB Plenum Box or a duct supply air system.
The QPB and QPBHW Plenum Box mounts on top of
the unit and has both vertically and horizontally
adjustable louvers on the front discharge grille.
For hot water coil option a QPBHWxx-F for free blow
or QPBHWxx-D for ducted airflow is used
When used with a ducted supply, a QCX Cabinet
Extension can be used to conceal the duct work above
the unit to the ceiling. This extends 20" above the unit
for a total height above the floor of 10'-7/8". The unit is
equipped with a variable speed indoor blower motor
which increases in speed with an increase in duct static
pressure. The unit will therefore deliver proper rated
airflow up to the maximum ESP shown in Table 8.
However, for quiet operation of the air system, the duct
static should be kept as low as practical, within the
guidelines of good duct design.
FILTERS
Two 1-inch throw away filters [(1) 16x16 and (1)
16x20] are supplied with each unit. The filters slide into
filter brackets. Refer to Figure 8.
The filters are serviced from the inside of the building
by opening the hinged door. This door is attached by
1/4 turn fasteners and one locking latch.
The internal filter brackets are adjustable to
accommodate 2-inch filters. The tabs for the 1-inch
filters must be bent down to allow the 2-inch filters to
slide in place.
FIGURE 7
SUPPLY DUCT CONNECTIONS
SUPPLY DUCT
TO BE FIELD
SUPPLIED
ATTACHMENT
SCREWS TO
BE FIELD
SUPPLIED
ROOM SIDE OF
QTEC UNIT
DUCT FLANGE
PROVIDED WITH
UNIT
FIGURE 8
FILTER LOCATION
RETURN AIR
GRILLE
FILTERS

Manual 2100-437E
Page 13 of 31
FRESH AIR INTAKE
This unit is equipped with a fresh air damper assembly.
The damper blade is locked in the closed position when
the unit is shipped from the Factory. To allow the
damper to operate remove the two plastic locking pins,
one on each end of the blade. This will allow for
maximum fresh airflow. The damper blade will now
open when the indoor blower is operating. If less than
maximum fresh airflow is required, reinsert the plastic
pins to limit damper blade opening to desired level.
Two extra pins are provided (taped to the inside of the
assembly) which may be used to hold the blade in some
position other than minimum or maximum position.
This fresh air assembly is located in the rear of the unit
and to gain access to make these adjustments remove
the air filter service door.
All capacity, efficiency and cost of operation
information as required for Department of Energy
“Energyguide” Fact Sheets are based upon the fresh air
blank-off plate in place and is recommended for
maximum energy efficiency.
The blank-off plate is available upon request from the
factory and is installed in place of the fresh air damper
shipped with each unit.
For details on energy recovery ventilation see separate
section.
CONDENSATE DRAIN
There are two drain connections on the unit. The rear
drain is the primary drain, and is located on the right
lower rear panel of the unit. The optional side drain is
located on the bottom right side of the unit. The side
drain is shipped with a plug installed.
The side drain requires a water trap for proper drainage.
See Figure 9. The drain can be routed through the floor
or through the wall. If the drain is to be routed
through an unconditioned space, it must be protected
from freezing. The drain line must be able to be
removed from the unit if it is necessary to remove the
unit from the wall. When the side drain is used, the
plug must be removed and installed in the rear drain
outlet.
The rear drain can be used with wall thickness of up to
10 inches where a water trap can be installed between
the unit and the interior wall. See Figure 10. The trap
cannot extend beyond the edge of the unit or it will
interfere with the wall mounting bracket. The drain can
be routed through the floor or through the wall. If the
drain is routed through the wall, the drain line must be
positioned such that it will not interfere with the sleeve
flange or the grille. See Figure 11. If the drain is to be
routed through an unconditioned space, it must be
protected from freezing.
Optional rear drain kits, both standard and heated
versions, are available to facilitate easy installation, and
also removability of heat pump for service.
SEPARATE EVAPORATOR DRAIN
CONNECTION (OPTIONAL)
A knockout is provided in the back right corner of the
units for use when draining the evaporator drain pan
separately from the condenser. This knockout is 5
inches above the back condenser drain opening. To
utilize a separate evaporator drain connection remove
the knockout and route the existing evaporator drain
hose out this knockout and then to an appropriate drain
line.
FIGURE 10
STANDARD REAR DRAIN
FIGURE 9
OPTIONAL SIDE DRAIN (SIDE VIEW)
INSTALLATION
QTEC UNIT

Manual 2100-437E
Page 14 of 31
SERVICE LIGHT
The unit is equipped with a service light, which
signals the user that service is required. The light
is located in the upper control panel and is visible
only when the hinged service/filter access door is
open.
The Service Unit light indicates that the unit has
been shut off by a high or low pressure device.
This indicates that the unit needs to be serviced.
FIGURE 12
UNIT MOUNTING
BOTTOM
TRIM PIECE BOTTOM TRIM
EXTENSION
MOUNTING
BRACKET
SIDE TRIM
(2 PCS.)
SIDE TRIM
(2 PCS.)
CABINET
SIDE PANEL
ENLARGED VIEW OF MOUNTING
BRACKET SHOWING SLEEVE TO
CABINET ATTACHMENT
MOUNTING BRACKET
#8 SCREW
PROVIDED
(LIGHT COLOR)
WALL
SLEEVE
#10 HEX
HEAD SCREW
PROVIDED
WATER
TRAP
FIGURE 11
REAR DRAIN (TOP VIEW)
WALL (MAXIMUM
10" FOR REAR
DRAIN)
COUPLINGS NOT
SHOWN BUT
RECOMMENDED
FOR EASE OF
REMOVABILITY
FOR SERVICE.
SLEEVE
DRAIN LINE
WALL
BRACKET
UNIT

Manual 2100-437E
Page 15 of 31
INSTALLATION INSTRUCTIONS
MOUNTING THE UNIT
When installing a QT EC unit near an interior wall on the
left side, a minimum of 8 inches is required; 12 inches is
preferred.
When installing a QT EC unit near an interior wall on the
right side, a minimum of 18 inches is required as
additional space is required to connect the side drain. If
the rear condensate drain kit QCDS48 is used the
minimum can be reduced to 8 inches.
This clearance is required to allow for the attachment of
the unit to the sleeve and side trim pieces to the wall.
This unit is to be secured to the wall sleeve with
mounting brackets provided. The unit itself, the supply
duct and the free blow plenum are suitable of “0”
clearance to combustible material.
Following are the steps for mounting the QT EC , for
reference see Figure 12.
1. Attach mounting brackets to the wall sleeve with
screws provided.
2. Position the unit in front of the sleeve with the
condenser section toward the sleeve.
3. Remove the locking screws from the wheels.
Refer to Figure 13.
4. Roll the unit into the sleeve. Make sure to check
both sides of the unit as it is being rolled to keep
it centered in the sleeve. Also check the
alignment to the mounting brackets. This unit
must be level from side to side. If adjustments
are necessary, shim up under the rollers with
sheets of steel or any substance that is not
affected by moisture.
5. Make sure the gasket on the rear of the unit is
touching the sleeve across the top and down both
sides. This is a rain water seal.
6. Secure the mounting brackets to the unit with
screws provided, #10 hex head sheet metal
screws.
7. Bottom trim extensions are provided for use when
wall is less than 14 inches but greater than 10.5
inches. Secure to wall with screws (not
provided).
8. Attach the bottom trim piece to the unit with the
screws provided (dark colored).
9. Position side trim pieces to wall and attach with
field supplied screws. There are two long pieces
and two short pieces supplied. The long pieces
are to enclose the gap behind the unit. The short
pieces are to fill the gap behind the cabinet
extension or the free blow plenum box. The may
be cut to suit your ceiling height or overlap the
unit side trim. There is sufficient length to trip up
to a 10'2" ceiling.
NOTE: If the exterior wall thickness is between 5
inches to 10.5 inches, a side trim extension
piece kit, model QSTX42, is available.
REMOVE SCREWS
FROM WHEELS
BEFORE ROLLING
INTO PLACE
FIGURE 13
REMOVING LOCKING SCREWS FROM WHEELS

Manual 2100-437E
Page 16 of 31
The standard Climate Control Option X is a remote
thermostat connection terminal block. See Figure 16 for
wiring diagram. Compatible thermostats are listed in
Table 4.
The Climate Control Option A is an electronic, non-
programmable manual or auto changeover thermostat.
The subbase of the thermostat is factory wired to the
front panel of the unit. See Figure 17 for wiring
diagram. Compatible for use with Bard CS2000A
Controller and Energy Recovery Ventilator.
The Climate Control Option D is an electronic,
programmable thermostat. The subbase of the
thermostat is factory wired to the front panel of the unit.
See Figure 18 for wiring diagram. Compatible for use
with Energy Recovery Ventilator or Economizer.
NOTE: On option X or A the CS2000A (or other field
provided means to control ventilation) must be
used if any of the motorized ventilation options
are installed.
WIRING – MAIN POWER
Refer to the unit rating plate and/or Table 2 for wire
sizing information and maximum fuse or “HACR Type”
circuit breaker size. Each unit is marked with a
“Minimum Circuit Ampacity”. This means that the
field wiring used must be sized to carry that amount of
current. Depending on the installed KW of electric
heat, there may be two field power circuits required. If
this is the case, the unit serial plate will so indicate. All
models are suitable only for connection with copper
wire. Each unit and/or wiring diagram will be marked
“Use Copper Conductors Only”. These instructions
MUST BE adhered to. Refer to the National Electrical
Code (NEC) for complete current carrying capacity data
on the various insulation grades of wiring material. All
wiring must conform to NEC and all local codes.
The electrical data lists fuse and wire sizes (75°C
copper) for all models, including the most commonly
used heater sizes. Also shown are the number of field
power circuits required for the various models with
heaters.
The unit rating plate lists a “Maximum Time Delay
Relay Fuse” or “HACR Type” circuit breaker that is to
be used with the equipment. The correct size must be
used for proper circuit protection, and also to assure that
FIGURE 14
COMPONENT LOCATION
TABLE 3
OPERATING VOLTAGE RANGE
NOTE: The voltage should be measured at the field
power connection point in the unit and while
the unit is operating at full load (maximum
amperage operating condition).
PATEGNAR
V042612–352
V802781–022
there will be no nuisance tripping due to the momentary
high starting current of the compressor motor.
The disconnect access door on this unit may be locked
to prevent unauthorized access to the disconnect.
See Start Up section for information on three phase
scroll compressor start-ups.
The field wiring connections are located behind the top
and hinged panel in the circuit breaker panel. See
Figure 14.
WIRING – LOW VOLTAGE WIRING
230/208V, 1 PHASE AND 3 PHASE EQUIPMENT
DUAL PRIMARY VOLTAGE TRANSFORMERS.
All Equipment leaves the factory wired on 240V tap.
For 208V operation, reconnect form 240V to 208V tap.
The acceptable operating voltage range for the 240 and
208V taps are as noted in Table 3.
DEHUMIDIFICATION
CONTROL
(OPTIONAL)
UNIT
MOUNTED
THERMOSTAT
LOCATION
ELECTRIC
HEATERS
CIRCUIT
BREAKER PANEL
& CONTROLS
I NDOOR
BLOWER
SIDE FIELD WIRE
ENTRANCE
LOWER
CONTROL
PANEL
REMOTE
THERMOSTAT
TERMINAL
BLOCK

Manual 2100-437E
Page 17 of 31
LOW VOLTAGE CONNECTIONS
FOR DDC CONTROL
Fan Only Energize G
Cooling Mode Energize Y1, G
1st Stage Heating Energize G, W1
2nd State Heating Energize G, W2
(if employed)
Ventilation Energize G, F
GENERAL
This unit is equipped with a variable speed ECM motor.
The motor is designed to maintain rated airflow up to
the maximum static allowed. It is important that the
blower motor plugs are not plugged in or unplugged
while the power is on. Failure to remove power prior
to unplugging or plugging in the motor could result in
motor failure.
CAUTION
Do not plug in or unplug blower motor
connectors while the power is on.
Failure to do so may result in motor failure.
LOW VOLTAGE CONNECTIONS
These units use a grounded 24 volt AC low voltage
circuit.
The “R” terminal is the hot terminal and the “C”
terminal is grounded.
“G” terminal or pin 6 of P2 is the fan input. If the
climate control option is abandoned and connections are
made directly to P2 pin 6 of P2 must be energized for
proper operation.
“Y1” terminal or pin 7 of P2 is the compressor input.
“W1” terminal or pin 8 of P2 is the fist stage heat.
“R” terminal or pin 10 of P2 is 24 VAC hot.
“C” terminal or pin 11 of P2 is 24 VAC grounded.
“L” terminal or pin 12 of P2 is compressor lockout
output. This terminal is activated on a high or low
pressure trip by the electronic heat pump control. This
is a 24 VAC output.
“W2” terminal or pin 9 of P2 is second stage heat (if
equipped). If the unit is equipped with an optional hot
water coil plenum box or electric heat these will be
energized by this terminal.
“F” terminal of pin 5 of P2 is the ventilation input.
This terminal energizes any factory installed ventilation
option.
NOTE: For total and proper control using DDC, a total
of 5 controlled outputs are required (4 if no
ventilation system is installed).

Manual 2100-437E
Page 18 of 31
FIGURE 15
TABLE 4
WALL THERMOSTATS
tatsomrehTserutaeFtnanimoderP
940-3048 )083-39F1(
taeHegats3;looCegats2 cinortcelEelbammargorP revoegnahclaunaMrootuA
850-3048 )1511D0225HT(
taeHegats2;looCegats2 elbammargorP-noNcinortcelE revoegnahclaunaMrootuA
MIS-1285

Manual 2100-437E
Page 19 of 31
FIGURE 16
REMOTE THERMOSTAT WIRING DIAGRAM
“X” THERMOSTAT OPTION
NOTE: On option X or A the CS2000A (or other
field provided means to control ventilation)
must be used if any of the motorized
ventilation options are installed.

Manual 2100-437E
Page 20 of 31
FIGURE 17
UNIT MOUNTED THERMOSTAT WIRING DIAGRAM
“A” THERMOSTAT OPTION
NOTE: On option X or A the CS2000A (or other field
provided means to control ventilation) must be used
if any of the motorized ventilation options are
installed.